128 lines
3.5 KiB
C#
128 lines
3.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Runtime.Serialization;
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using System.Xml;
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namespace Volian.CSLA.Library
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{
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[Serializable()]
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class XMLProperties
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{
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#region Constructors
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public XMLProperties()
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{
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_XmlContents = new XmlDocument();
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_XmlContents.LoadXml("<config/>");
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}
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public XMLProperties(string xml)
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{
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_XmlContents = new XmlDocument();
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_XmlContents.LoadXml(xml);
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}
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#endregion
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#region BusinessMethods
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[NonSerialized]
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XmlDocument _XmlContents;
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public XmlDocument XmlContents
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{
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get { return _XmlContents; }
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}
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private XmlNode GetGroup(string group)
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{
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XmlNodeList xl = _XmlContents.DocumentElement.SelectNodes(string.Format("//{0}", group));
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switch (xl.Count)
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{
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case 0: // No nodes found
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return null;
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case 1: // Found the node
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XmlNode xn = xl[0];
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if (xn.GetType() == typeof(XmlElement)) return xn;
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throw new XmlPropertiesException("Retrieved {0} while looking for XmlElement //{1}", xn.GetType().ToString(), group);
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default: // Found more than 1 node
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throw new XmlPropertiesException("Found more than one node //{0}", group);
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}
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}
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private XmlAttribute GetItem(XmlNode xx, string item)
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{
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XmlNodeList xl = xx.SelectNodes(string.Format("@{0}", item));
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switch (xl.Count)
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{
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case 0: // No nodes found
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return null;
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case 1: // Found the node
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XmlNode xn = xl[0];
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if (xn.GetType() == typeof(XmlAttribute)) return (XmlAttribute)xn;
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throw new XmlPropertiesException("Retrieved {0} while looking for XmlAttribute @{1}", xn.GetType().ToString(), item);
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default: // Found more than 1 node
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throw new XmlPropertiesException("Found more than one node @{0}", item);
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}
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}
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public string this[string group, string item]
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{
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get
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{
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XmlNode xn = GetGroup(group);
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if (xn == null) return string.Empty;
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XmlNode xa = GetItem(xn, item);
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if (xa == null) return string.Empty;
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return xa.InnerText;
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}
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set
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{
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if (value == null) value = string.Empty;
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XmlNode xn = GetGroup(group);
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if (xn == null)
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{
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if (value != string.Empty)// Add Group and Item
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{
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xn = _XmlContents.DocumentElement.AppendChild(_XmlContents.CreateElement(group));
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XmlAttribute xa = xn.Attributes.Append(_XmlContents.CreateAttribute(item));
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xa.Value = value;
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}
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}
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else
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{
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XmlAttribute xa = GetItem(xn, item);
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if (xa == null)
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{
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if (value != string.Empty) // Add Item
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{
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xa = xn.Attributes.Append(_XmlContents.CreateAttribute(item));
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xa.Value = value;
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}
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}
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else
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{
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if (value != string.Empty) // Add Item
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{
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xa.Value = value;
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}
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else
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{
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xn.Attributes.Remove(xa);
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if (xn.Attributes.Count == 0)
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_XmlContents.DocumentElement.RemoveChild(xn);
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}
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}
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}
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}
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}
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public override string ToString()
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{
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return _XmlContents.OuterXml;
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}
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#endregion
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#region XmlPropertiesException
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public class XmlPropertiesException : Exception
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{
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public XmlPropertiesException() : base() { ;}
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public XmlPropertiesException(string message) : base(message) { ;}
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public XmlPropertiesException(string messageFormat,params object [] args) : base(string.Format(messageFormat,args)) { ;}
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public XmlPropertiesException(SerializationInfo info, StreamingContext context) : base(info, context) { ;}
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public XmlPropertiesException(string message,Exception innerException) : base(message, innerException) { ;}
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}
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#endregion
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}
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}
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